參數(shù)資料
型號(hào)： LTC2424I
廠商： Linear Technology Corporation
英文描述： 16-Bit 2.5-V to 3.3-V/3.3-V To 5-V Level Shifting Transceiver With 3-State Outputs 54-BGA MICROSTAR JUNIOR -40 to 85
中文描述： 4-/8-Channel 20位ADC的無(wú)延遲uPower
文件頁(yè)數(shù)： 26/36頁(yè)
文件大?。?/td> 409K
代理商： LTC2424I
LTC2412
26
2412f
APPLICATIU
W
U
U
various values of source resistance imbalance between
the IN
+
and IN
–
pins when large C
IN
values are used.
If possible, it is desirable to operate with the input signal
common mode voltage very close to the reference signal
common mode voltage as is the case in the ratiometric
measurement of a symmetric bridge. This configuration
eliminates the offset error caused by mismatched source
impedances.
The magnitude of the dynamic input current depends upon
the size of the very stable internal sampling capacitors and
upon the accuracy of the converter sampling clock. The
accuracy of the internal clock over the entire temperature
and power supply range is typical better than 0.5%. Such
a specification can also be easily achieved by an external
clock. When relatively stable resistors (50ppm/
°
C) are
used for the external source impedance seen by IN
+
and
IN
–
, the expected drift of the dynamic current, offset and
gain errors will be insignificant (about 1% of their respec-
tive values over the entire temperature and voltage range).
Even for the most stringent applications, a one-time
calibration operation may be sufficient.
In addition to the input sampling charge, the input ESD
protection diodes have a temperature dependent leakage
current. This current, nominally 1nA (
±
10nA max), results
in a small offset shift. A 100
source resistance will create
a 0.1
μ
V typical and 1
μ
V maximum offset voltage.
Reference Current
In a similar fashion, the LTC2412 samples the differential
reference pins REF
+
and REF
–
transfering small amount of
charge to and from the external driving circuits thus
producing a dynamic reference current. This current does
not change the converter offset, but it may degrade the
gain and INL performance. The effect of this current can be
analyzed in the same two distinct situations.
For relatively small values of the external reference capaci-
tors (C
REF
< 0.01
μ
F), the voltage on the sampling capacitor
settles almost completely and relatively large values for
the source impedance result in only small errors. Such
values for C
REF
will deteriorate the converter offset and
gain performance without significant benefits of reference
filtering and the user is advised to avoid them.
Larger values of reference capacitors (C
REF
> 0.01
μ
F) may
be required as reference filters in certain configurations.
Such capacitors will average the reference sampling charge
and the external source resistance will see a quasi con-
stant reference differential impedance. When F
O
= LOW
(internal oscillator and 60Hz notch), the typical differential
reference resistance is 1.3M
which will generate a gain
error of approximately 0.38ppm at full-scale for each ohm
of source resistance driving REF
+
or REF
–
. When F
O
=
HIGH (internal oscillator and 50Hz notch), the typical
differential reference resistance is 1.56M
which will
generate a gain error of approximately 0.32ppm at full-
scale for each ohm of source resistance driving REF
+
or
REF
–
. When F
O
is driven by an external oscillator with a
frequency f
EOSC
(external conversion clock operation), the
typical differential reference resistance is 0.20 10
12
/
f
EOSC
and each ohm of source resistance drving REF
+
or
REF
–
will result in 2.47 10
–6
f
EOSC
ppm gain error at full-
scale. The effect of the source resistance on the two
reference pins is additive with respect to this gain error.
The typical +FS and –FS errors for various combinations
of source resistance seen by the REF
+
and REF
–
pins and
external capacitance C
REF
connected to these pins are
shown in Figures 18, 19, 20 and21.
Figure 17. Offset Error vs Common Mode Voltage
(V
INCM
= IN
+
= IN
–
) and Input Source Resistance
Imbalance (
R
IN
= R
SOURCEIN
+ – R
SOURCEIN
–) for
Large C
IN
Values (C
IN
≥
1
μ
F)
V
INCM
(V)
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
O
R
)
2412 F17
120
100
80
60
40
20
0
–20
–40
–60
–80
–100
–120
F
O
= GND
T
A
= 25
°
C
R
SOURCEIN
– = 500
C
IN
F
V
CC
= 5V
REF
+
= 5V
REF
–
= GND
IN
+
= IN
–
= V
INCM
A:
R
IN
= +400
B:
R
IN
= +200
C:
R
IN
= +100
D:
R
IN
= 0
E:
R
IN
= –100
F:
R
IN
= –200
G:
R
IN
= –400
A
B
C
D
E
F
G
相關(guān)PDF資料
PDF描述
LTC2424IG 16-Bit 2.5-V to 3.3-V/3.3-V To 5-V Level Shifting Transceiver With 3-State Outputs 48-TSSOP -40 to 85
LTC2440 2-Channel Differential Input 24-Bit No Latency DS ADC
LTC2411-1 16-Bit Universal Bus Driver With 3-State Outputs 48-TVSOP -40 to 85
LTC2412 16-Bit Universal Bus Driver With 3-State Outputs 48-SSOP -40 to 85
LTC2412CGN 16-Bit Universal Bus Driver With 3-State Outputs 48-TVSOP -40 to 85
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC2424IG 功能描述:IC ADC 20BIT 4CH MICROPWR 28SSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端，單極
LTC2424IG#PBF 功能描述:IC ADC 20BIT 4CH MICROPWR 28SSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端，單極
LTC2424IG#TR 功能描述:IC ADC 20BIT 4CH MICROPWR 28SSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端，單極
LTC2424IG#TRPBF 功能描述:IC ADC 20BIT 4CH MICROPWR 28SSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端，單極
LTC2428CG 功能描述:IC ADC 20BIT 8CH MICROPWR 28SSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端，單極
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*